A primary motivation of our research is the monitoring of physical, physiological, and biochemical parameters - in any environment and without activity restriction and behaviour modification - through using miniaturised, wireless Body Sensor Networks (BSN). Key research issues that are currently being addressed include novel sensor designs, ultra-low power microprocessor and wireless platforms, energy scavenging, biocompatibility, system integration and miniaturisation, processing-on-node technologies combined with novel ASIC design, autonomic sensor networks and light-weight communication protocols. Our research is aimed at addressing the future needs of life-long health, wellbeing and healthcare, particularly those related to demographic changes associated with an ageing population and patients with chronic illnesses. This research theme is therefore closely aligned with the IGHI’s vision of providing safe, effective and accessible technologies for both developed and developing countries.

Some of our latest works were exhibited at the 2015 Royal Society Summer Science Exhibition.


Citation

BibTex format

@inproceedings{Gil:2016:10.1109/BSN.2016.7516281,
author = {Gil, Rosa BM and Yang, GZ},
doi = {10.1109/BSN.2016.7516281},
publisher = {IEEE},
title = {Active implantable sensor powered by ultrasounds with application in the monitoring of physiological parameters for soft tissues},
url = {http://dx.doi.org/10.1109/BSN.2016.7516281},
year = {2016}
}

RIS format (EndNote, RefMan)

TY  - CPAPER
AB - Ultrasound imaging is a proven diagnostic tool to assess a myriad of physiological and pathological conditions in patients. Throughout the years, ultrasounds have been used as a passive recording modality where the backscattered echo arising from the interaction of the sound waves with the acoustic properties of the biological tissues helps to identify them. Apart from a wide range of therapeutic applications, the acoustic beam has not yet been explored to actuate within the biological environment in an active way. In this paper we present an implantable electronic device to be actuated remotely by ultrasounds with capabilities for measuring several physiological parameters of tissues: pH, temperature, electrolyte concentration and biopotentials. The small factory form device (with no attached batteries) harvests energy from the incoming ultrasound waves and uses it to power the embedded electronics. It operates from voltage levels as low as 0.8 V and consuming a total current of 60 μA (or an average power consumption of 84 μW) in the active mode when deployed at a distance of 3 cm from the active source of ultrasounds in vitro, excited by a sinusoid at 400 kHz with power density of 20 mWcm-2. The sensor can be actuated by a specifically-designed readout device (as detailed in this paper) or using the traditional medical probes for ultrasound imaging. The actual device can present an alternative to surpass the limitations of inductive and RF-powered sensors implanted in soft tissues.
AU - Gil,Rosa BM
AU - Yang,GZ
DO - 10.1109/BSN.2016.7516281
PB - IEEE
PY - 2016///
SN - 2376-8894
TI - Active implantable sensor powered by ultrasounds with application in the monitoring of physiological parameters for soft tissues
UR - http://dx.doi.org/10.1109/BSN.2016.7516281
UR - http://hdl.handle.net/10044/1/43464
ER -